#include<iostream>
using namespace std;
class A
{
public:
	A(int a)
	{
		_a = a;
	}
private:
	int _a;
};


class Date
{
public:
	Date(int year, int month, int day, int i)
		:N(10)
		, _aa(-1)
		,_ret(i)
	{
		_year = year;
		_month = month;
		_day = day;
	}
private:
	int _year;
	int _month;
	int _day;
	const int N;
	A _aa;
	int& _ret;
};
int main()
{
	int i = 0;
	Date d(2022, 7, 2, i);
	return 0;
}